package patten.xingwei.observer.demo3;

/**
 * Description：股票主提
 * Author：zwenzhi
 * Date：2023/11/18 9:41
 */
public interface ShareCertificateSubject {
    void addObserver(ShareCertificateObserver certificateObserver);
    void removeObserver(ShareCertificateObserver certificateObserver);
    void notifyObserver();
}
